Formation of Aluminium(III)‐Monocarboxylates in Aqueous Solution

Pohlmeier, Andreas; Thesing, Ulrich; Knoche, Wilhelm

doi:10.1002/bbpc.19930970103

Cited by 6 publications

(1 citation statement)

References 13 publications

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“…We simulated the species distribution diagrams (Figure S4a) using the free software MEDUSA (Windows interface) and HYDRA (database manager) developed by Puigdomenech. The resulting simulations agreed with speciation diagrams described in the literature for similar systems [49][50][51][52][53]. These curves were then used for pH correction in the determination of Al 3+ in soil extracts with the sensor developed in this work.…”

Section: Al 3+ Diagram Speciessupporting

confidence: 75%

Laser-Induced Graphene Electrochemical Sensor for Quantitative Detection of Phytotoxic Aluminum Ions (Al 3+ ) in Soils Extracts

Loaiza,

Roche,

Renjifo

et al. 2023

Preprint

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Aluminum in its Al3+ form is a metal that inhibits plant growth, especially in acidic soils (pH < 5.5). Rapid and accurate quantitative detection of Al3+ in agricultural soils is critical for the timely implementation of remediation strategies. However, detecting metal ions requires time-consuming preparation of samples, using expensive instrumentation and non-portable spectroscopic techniques. As an alternative, electrochemical sensors offer a cost-effective and minimally invasive approach for in situ quantification of metal ions. Here, we developed and validated an electrochemical sensor based on bismuth-modified laser-induced graphene (LIG) electrodes for Al3+ quantitative detection in a range relevant to agriculture (1 to 300 ppm). Our results show a linear Al3+ detection range of 1.07–300 ppm with a variation coefficient of 5.3%, even in the presence of other metal ions (Pb2+, Cd2+, and Cu2+). The sensor offers a limit of detection (LOD) of 0.34 ppm and a limit of quantification (LOQ) of 1.07 ppm. We compared its accuracy for soil samples with pH < 4.8 to within 89–98% of spectroscopic methods (ICP-OES) and potentiometric titration. This technology's portability, easy to use, and cost-effectiveness make it a promising candidate for in situ quantification and remediation of Al3+ in agricultural soils and other complex matrices.

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Section: Al 3+ Diagram Speciessupporting

confidence: 75%

Laser-Induced Graphene Electrochemical Sensor for Quantitative Detection of Phytotoxic Aluminum Ions (Al 3+ ) in Soils Extracts

Loaiza,

Roche,

Renjifo

et al. 2023

Preprint

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Kinetics of complexation of heavy metal ions with polyelectrolytes in aqueous solution

Hermeier

Herzig

Knoche

et al. 1996

Ber Bunsenges Phys Chem

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The kinetics of the binding of Ni2+ to polycarboxylate anions have been studied using pressure‐ and temperature‐jump relaxation techniques. The reaction proceeds via the two‐step Eigen mechanisms: free ions form the outer‐sphere and in the second step the inner‐sphere complex. The outer‐sphere complex is exceptionally stable due to the polyelectrolyte effect, and the electrical potential at the polyelectrolyte surface is estimated to be ψ ≈−86 mV. The rate constant for the formation of the inner‐sphere complex is in the same range as that obtained for Ni2+ complexes with small anions. The formation of bidentate complexes does not contribute significantly to the stability of the complexes. A parallel study of the reactions of Ni2+ with malonate and succinate has been performed.

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Metal Speciation, Chelation and Complexing Ligands in Plants

Pohlmeier¹

2004

Heavy Metal Stress in Plants

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Formation of Aluminium(III)‐Monocarboxylates in Aqueous Solution

Cited by 6 publications

References 13 publications

Laser-Induced Graphene Electrochemical Sensor for Quantitative Detection of Phytotoxic Aluminum Ions (Al 3+ ) in Soils Extracts

Laser-Induced Graphene Electrochemical Sensor for Quantitative Detection of Phytotoxic Aluminum Ions (Al 3+ ) in Soils Extracts

Kinetics of complexation of heavy metal ions with polyelectrolytes in aqueous solution

Metal Speciation, Chelation and Complexing Ligands in Plants

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